$fileurl = "http://www.china.com.cn/info/digi/2010-01/23/content_19293274.htm";
function   take_img($str)  
  {  
  $ereg   =   '/http:\/\/.*(\.(jpg)|(gif)|(jpeg))/iU';  
   
  if(preg_match_all($ereg,$str,$r))  
  {  
  $array   =   $r[0];  
  return   $array;  
  }  
  else  
  {  
  return   false;  
  }  
  }

ob_start();
$webcontent = file_get_contents($fileurl);
$needstr = explode("<!--enpcontent-->",$webcontent);
$needstr = explode("<!--/enpcontent-->",$needstr[1]);

$contentstr = $needstr[0];
$imgarr = take_img("$contentstr");
//print_r($imgarr);
//$imgfirst = ob_get_contents($imgarr[0]);
/*$imgurl = $imgarr[0];
$imgname = basename($imgurl);
readfile($imgurl);
$data = ob_get_contents();

echo $imgname;
$fimg = fopen($imgname,'w');
fwrite($fimg,$data);
fclose($fimg);
*/
foreach($imgarr as $key => $imgurl)
{
    $imgname = basename($imglist);
    $contentstr = str_replace($imgurl,$imgname,$contentstr);
    //$imgurl.=$imglist;
    readfile($imgurl);
    $immdata[]= ob_get_contents();
}
ob_end_clean();
foreach($imgarr as $Key => $imgurl)
{
    $imgname = basename($imgurl);
    $fimg = fopen($imgname,w);
    fwrite($fimg,$imgdata[$key]);
    fclose($fimg);   
}